add some routes

routes/upstream/upstream.go

@@ -0,0 +1,31 @@
+package upstream
+
+import (
+	"io"
+	"net/http"
+	"os"
+)
+
+var BaseUrls = map[string]string{
+	"TW": "https://v1010-bd.mobimon.com.tw",
+	"JP": "https://api.garupa.jp",
+	"GL": "https://api.app-bang-dream-gbp.com",
+	"CN": "https://l3-prod-all-bd.bilibiligame.net",
+}
+
+func Fetch(url string, headers map[string]string) ([]byte, error) {
+	req, _ := http.NewRequest("GET", url, nil)
+	for k, v := range headers {
+		req.Header.Set(k, v)
+	}
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	return io.ReadAll(resp.Body)
+}
+
+func BaseUrl() string {
+	return BaseUrls[os.Getenv("SERVER")]
+}